Process of japanning metal surfaces.



P. ORAMAS.

PROCESS 0F JAPANNING METAL SURPAOES.

APPLICATION FILED JULY 16, 1908.

Patented Deml, 1908.

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UNITED STATES PATENT OFFICE.

PATRICIO ORAMAS, OF NEW YORK,.N. Y., ASSIGNOR OF ONE-HALF TO OSCAR LOOSAND ONE- HALF TO GEORGE STAHL, BOTH OF NEW YORK, N. Y.

PROCESS OF .TAPANNING- METAL SURFACES.

Specification o! Letters Patent.

Patented Dec. 15, 1908.

Application filed .'l'uly 16, 1908. Serial No. 443,783.

To all whom it may concern:

Be it known that I, PATRICIO ORAMAS, a citizen of the Kingdom of Spain,residing in New York, in the borough of Brooklyn,

county of Kings, and State of New York,

have invented certain new and useful Improvements in Processes ofJapanning Metal Surfaces, of which the following is a specilication.

This invention relates to an improved process of japanning metalsurfaces in imitation of leather so that a tenacious and durable coatingin different colors is obtained, to be used for lamp-fonts,opera-glasses and metallic articles of all kinds, where heretoforeleather-coverings were used; and for this purpose the invention consistsof a process of japanning metal in imitation of leather by coating thecarefully cleaned surfaces with black or other colored Varnish, thenscreening a layer of bran over the varnish coating, then subjecting thethus coated surfaces in a japanning furnace to a temperature increasinggradually from 500 C. to 150O C., next polishing the japanned surfacesfor removing the carbonized bran, and lastly polishing the surfaces.

In the accompanying drawing, Figure 1 represents a perspective view of ametal plate provided with a coating in imitation of leather madeaccording to my improved process, and F ig. 2 is a vertical longitudinalsection on line 2, 2, Fig. 1.

In carrying out my improved process of j apanning metal articles, thesurfaces of the same are first carefully cleaned with benzene or othersuitable liquid hydrocarbon and then coated with a varnish of black,dark green or other suitable color. A layer of bran is next screenedover the surface while it is still moist, and the article then placed ina gas-heated japanning furnace for hardening the coated surface andcarbonizing the bran so that the varnish-and-bran coated surface assumesa porous character or grain in imitation of the pores of leather-goods.The heating to which the so-coated articles are subjected in the furnacehas to be gradually increased from a temperature of about 50 C. to 150C. for about two hours. The articles are then removed from the furnaceand are carefully polished forl removing the superlluous particles ofcarbonized bran. f If necessary, another coat of the same colored varcnish is placed over the grained surface and again subjected to hardeningin the furnace to a temperature of from 50o to 150O C. for another twohours, after which the surface is again carefully polished for'removingthe carbonized bran. Sometimes a third coating is given whenever a thickcoating of japan isrequired. The result is a surface which is a closeimitation of leather and which adheres tenaciously and permanently tothe surface of the metal and impart to it a hardened, non-removablecoating in imitation of leather. The process is applicable to brass andother metallic surfaces, and canbe used in all cases where heretoforea'leathercovering was employed.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

l 1. The process herein described of japanning metallic articles inimitation of leather, which comprises the following successive steps,first coating the cleaned surface of` the articles with a black or othercolored varnish, screening a layer of bran over the varnished surface,subjecting it to a temperature increasing gradually from 50O C. to 150oC., and lastly polishing the same.

2. The process herein described of japanning metallic articles inimitation of leather, which comprises the following successive steps,first coating the cleaned surface of the articles with a black or othercolored varnish, screening a layer of bran over the varnished surface,subjecting it to a temperature increasing gradually from 50o C. to v150oC., and lastly polishing the same and then repeating the foregoing stepsuntil a coating of the required thickness is obtained.

In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

PATRICIO ORAMAS.

Witnesses:

PAUL GOEPEL, HENRY J SUHRBmR.

